Canon has just filed a new lens patent for EF 20-45mm F/2.8-4 lens. This is another new wide-angle zoom lens for Canon DSLRs.
Detail translated by Google:
- Patent Publication No. 2015-197553
- Published 2015.11.9
- Filing date 2014.4.1
- Example
- Zoom ratio 2.25
- Focal length 20.00 23.60 45.00
- F-number 2.75 2.90 4.16
- Half angle (in degrees) 47.25 42.51 25.68
- Image height 21.64 21.64 21.64
- Overall length of the lens 158.28 156.32 173.36
- BF 42.05 46.10 73.14
Source: EG
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